Hello I have a few questions

I first want to say that I was on the depo provera shots for 4 years and off of it for 4 years. But heres the thing I was told that it could take up to 8 years for it to completely get out of your body and I was wondering if there was anything you could do to make it get out faster? because I dont want to wait til im 27 to have kids im 23 now and I think it would be good if I could have them now then later and also when is the most fertile time between af's? I heard it is 12-15 days between cycles...
Also I was wondering if cysts could cause u not to get pg? I had 1 on my right ovary then it broke and I went to the hospital and they did an ultrasound and said there was another one on my left ovary but it never broke. So could that be why I am not getting pg? Well if anyone has any advice that would be great thankyou for reading this